Ok,I just picked up a stripped Sun Devil upper without M4 ramps. Im looking for recomendations for a barrel. Like I said above the reciever does not have M4 cuts. I know I can cut them myself if I get a barrel that does. Its not a big deal to me any way as there are tons of ARs out there without them. But anyways what barrels are you using and which barrels would you use if its was your 10.5 upper